Re: Generating a function from a series

*To*: mathgroup at smc.vnet.net*Subject*: [mg65375] Re: [mg65354] Generating a function from a series*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Wed, 29 Mar 2006 06:34:14 -0500 (EST)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

Use Normal f[x_]=Sin[x]; fs[x_] = Normal[Series[f[x],{x,0,5}]]; Plot[{f[x],fs[x]},{x,0,Pi},PlotStyle->{Blue,Red}]; Bob Hanlon > > From: Geico Caveman <spam at spam.invalid> To: mathgroup at smc.vnet.net > Subject: [mg65375] [mg65354] Generating a function from a series > > How does one generate a function from a series ? > > For example : > > sf=Series[f(x),{x,0,3}]; > fs[y_]=sf/.x->y > > Now this leaves that pesky O(()^4) term in the function definition, > rendering the function useless for plots etc. How do I get rid of it ? > >